Can someone pls. confirm, that MQTT is running w\ latest FW
I'm testing some sensors, and just wanted to push the measurements to my local MQTT Broker. But I get allways an error in the MQTT lib.
File "main.py", line 51, in <module> File "/flash/lib/mqtt.py", line 84, in connect IndexError: bytes index out of range
I did it a thousand times with WiPys 2.0 and LoPys, and it worked allway seemlessly.
Arghh. Got it. It was a typo in the config file of my broker. The broker was running on the wrong port.
You don't use client.connect(). Is this right? The connect() method is the one, that gives me the error.
ledbelly2142 last edited by ledbelly2142
Yes from this example
Your main.py should have something like:
import socket import struct import machine import time import ubinascii import network from network import WLAN from network import LoRa from mqtt import MQTTClient wlan = network.WLAN(mode=network.WLAN.STA, antenna=WLAN.EXT_ANT) #wlan.antenna(WLAN.EXT_ANT) You may be using internal antenna wlan.connect('WiFiSSID', auth=(WLAN.WPA2, 'WiFiPassword'), timeout=5000) while not wlan.isconnected(): machine.idle() print(wlan.ifconfig()) print("Connected to Wifi\n") client = MQTTClient("nameofMQTTserver", "IPaddressOrURLforMQTTserver", port=1883, user="EnterUserNameForMQTTserver", password="EnterPasswordForMQTTserver") client.settimeout = settimeout # You may not be using port 1883, use 8883 if using SSL #then test with something like: client.publish("house001/sensor/sensorId_001/temp/c", "23.48") #the way this library is set up, it needs the topic, then the topic value to be written
If you are not using MQTTlense, I highly recommend it for Chrome. Simple and easy to use for testing. More on MQTTlense HERE
The QOS for this Library is set to 0 (best effort similar to TCP/IP), to avoid ping pong MQTT messaging, use QOS 2 (once and only once) on the subscriber for testing.
The MQTT lib from Pycom (on github) is working for me.
ledbelly2142 last edited by
The MQTT lib from Pycom (on github) is working for me. I did not get an index error.